Widows Walk Mystery Cache

The cache is hidden three or four miles south of Yuba City. To determine the exact  location, you must sail into the puzzle below. Driving south bound on Hwy 99 is best. And, be careful, as there often is heavy traffic along this road.

The whalers sailed off to sea
leaving their wives astern.
The women would endlessly pace
waiting for their men to return.
[Notice the widows walk near by.]

1. it opened in 1869 and provided a shortcut for steamships (2nd word)
2. Coleman's clipper ship which advertised a 105 day passage to San Francisco
3. Captain of the New Bedford bark "George" which was abandoned and lost in 1871
4. distance traveled by Nemo's ship "Nautilus" (first two digits, +1)
5. UK tea clipper, I.D. 63557
6. he mused, "this is my substitute for pistol and ball"
7. most successful whaling merchant in New Bedford in mid-1800's (second letter)
8. the largest animal ever known to have existed
9. the primary weapon used in whaling
10. year that the opium clipper "Water Witch" was built (sum of first and second digits)
11. the beluga is white in color and lacks this fin
12. when the first sperm whale was killed in Nantucket (last two digits)
13. fanatic sea Captain who pursued a white whale

You can validate your puzzle solution with certitude.